Grandstream HT-503Brand NewIncludes One Year WarrantyThe Grandstream HT-503 offers the next generation of powerful, affordable, high quality and manageable IP telephony ATA/IAD. The integration of a FXO and FXS port enables remote call origination and termination to and from the PSTN line, known as Hop-on and Hop-off calling. HandyTone 503 is based on SIP standard and is interoperable with most 3rd party SIP compliant devices and software. This device also features dual 10M/100Mbps network ports, port status, message waiting LED, and multilingual voice prompts. All these functionalities coupled with its compact size make it an ideal solution for road warriors seeking the savings and benefits of VOIP communication.